Emerson Liebert iCOM Manual De Usuario
Operation
49
Liebert
®
iCOM
®
3.6.1 Electric, Hot Gas and Hot Water Reheat
Different types of cooling units feature different types of standard electrical heating. Not all types
offer hot gas or hot water reheat. The number of electrical heating stages also varies—some types of
cooling units have single-stage electrical heating as standard and offer two-stage electrical heating as
an option. Other types feature three-stage heating as standard.
The Reheat Proportional Band is divided into three equal parts, each representing one reheat stage.
The Reheat Proportional Band is divided into three equal parts, each representing one reheat stage.
As the Temperature Proportional Band increases the call for heating from 0% to -100%, stages 1
through 3 are switched On, as shown in Figure 42. Your unit will have one of the nine reheat
configuration types shown in Table 7.
Figure 42 Three-stage heating
Table 7
Reheat configuration types
Type
A
B
C
D
E
F
G
H
I
Stage 1 Electric 1 Electric 1 Electric 1 Hot Gas
Hot Gas
Hot Gas
Hot Water
Hot Water
Hot Water
Stage 2
-
Electric 2 Electric 2
-
Electric 1 Electric 1
-
Electric 1
Electric 1
Stage 3
-
-
Electric 3
-
-
Electric 2
-
-
Electric 2
NOTE
1. Hot gas / hot water are not influenced by the setting of electric reheat during
1. Hot gas / hot water are not influenced by the setting of electric reheat during
dehumidification.
2. Hot gas output will be set only if the selected compressor is in operation.
0%
Heating
65
70
Heat 3
On
½ Dead-
band
66
67
68
69
Heat 2
On
Heat 1
On
Heat 3
Off
Heat 2
Off
Heat 1
Off
-100 %
Heating
½ Proportional Band
Decreasing Temperature
Temp Setpoint: 70°F
Proportional Band: 8°F
Deadband: 2°F
Proportional Band: 8°F
Deadband: 2°F